# 2021 Magic: The Gathering Magic Online Promos #91291

> The 2021 Magic Online Promos release featuring Magmatic Sinkhole, card number 91291. This rare red Instant brings powerful Delve mechanics to the table for serious collectors and players alike.

Canonical URL: https://supercatch.com/product/magic-the-gathering-magic-online-promos-magmatic-sinkhole-91291

## Identity

- **Year**: 2021
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Magic Online Promos
- **Card number**: #91291
- **Product type**: TCG_CARD

## Description

Identified by card number 91291, this piece is categorized as a rare card within the promotional subset, appealing to collectors who focus on specific digital-era distributions and set completions. Mechanically, Magmatic Sinkhole functions as a six-mana red Instant. Its design leverages the Delve keyword ability, allowing players to exile cards from their own graveyard to reduce the spell's cost. This interaction creates a dynamic gameplay loop where graveyard management becomes crucial for casting the spell efficiently. Once resolved, the card deals five damage to a target creature or planeswalker, offering a potent removal option that fits into various strategic archetypes. The flavor text adds narrative depth, describing the earth swallowing a traveler, which aligns with the card’s destructive theme. For collectors, the value of this card often lies in its association with the Magic Online Promos set rather than just its in-game utility. Collectors frequently seek out specific card numbers to complete their catalog of promotional releases, making Magmatic Sinkhole an important piece for those tracking the evolution of digital card distributions. The card's rarity designation ensures it holds a place of interest among those who value the diversity of the Magic Online ecosystem. Whether you are building a collection of rare promotional items or analyzing the mechanical design of red removal spells, this card represents a significant point of interest in the 2021 promotional landscape.

## FAQ

### What is the Delve mechanic in Magic: The Gathering?

Delve is a keyword ability that allows a player to exile cards from their graveyard as they cast a spell. Each card exiled this way pays for one generic mana, effectively reducing the total mana cost required to cast the spell.

### What is the mana value of Magmatic Sinkhole?

Magmatic Sinkhole has a mana value of 6. This is calculated from its mana cost of five red mana and one generic mana, regardless of any potential cost reductions from the Delve mechanic during gameplay.

### What type of card is Magmatic Sinkhole in the 2021 Magic Online Promos set?

Magmatic Sinkhole is a rare Instant card in the Magic Online Promos set. It is a red card that targets a creature or planeswalker to deal damage, featuring artwork by Mark Behm.

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Last verified: 2025-11-29.